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GCSE Biology 2020-2022 OCR Gateway

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Pregunta:

What is the Xylem made off?

Autor: eric_galvao



Respuesta:

It is made from dead cells joined end to end with no walls between them. The hole in the middle is called the Lumen. It has quite thick side walls, made from cellulose which is strong and stiff which therefore gives the plant support. They are also coated with Lignin, a material which doesn't rot the wall.


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